Walter p



W. P. MURPHY.

Mar. 27, 1923.

DUMP CAR DOOR. HLEp JUL 2 SHEETS-SHEET I.

w. P. MURPHY.

DUMP CAR DOOR.

Mar. 27, 1923.

2 SHEETSSHEET 2- FILED JULY 30, I920.

Patented Mar. 27, 1923.

UNITED STATES WALTER I. MURPHY,

OF NEW YORK, N. Y.

DUMP-GAR noon.

Application filed July 30,

To all whom it may concern:

Be it known that I, VALTER P. MURPHY, a citizen of the United States,residing at New York city, in the county of New York and State of NewYork, have inventedv certain new and useful Improvements in I Dump-CarDoors, of which the following is a specification.

My invention relates to hinged doors or drop bottom panels for railwaycars of the dumping type, such as hopper cars, hopper gondola cars andgeneral service cars. These doors, it will be understood, are subject tovery severe shocks and pressures when the cars are loaded, for example,and also when the loaded cars are in transit since the doors must carry,to a considerable extent, the weight of the cargo. It is, therefore,important that they be constructed so as to be sufiiciently strong andrigid to resist breakage or deformation under the stresses exertedagainst them when the cars are in service.

The principal object of this invention is to provide a sheet metal doorfor a railway car of the dumping type which, without being unduly heavyand bulky, will have the characteristics of strength, stiff ness anddurability.

A further object is to provide a door of this sort which may bemanufactured at relatively low cost.

The invention is illustrated, in certain preferred embodiments, in theaccompanying drawings wherein Fig. 1 is a fragmentary plan view of ageneral service car provided with doors or drop bottom elementsconstructed in accordance with my invention.

Figs. 2 and 3 are sectional views on lines 2-2 and 3-3 of Fig. 1, theframing of the car, however, being omitted.

Fig. 4 is a plan view of a form of door intended particularly for hoppercars.

Fig. 5 is a sectional view on line 5-5 of Fig 4.

Fig. 6 is a plan view illustrating another modification, and

Fig. 7 is a fragmentary sectional view 011 line 77 of Fig. 6. I

In Fig. 1 I have shown a general service gondola car of commonconstruction provided with doors or drop bottom panels formed inaccordance with my invention. In this figure 1O designates the end wallof the car and 11, 11 the side walls there- 1920. Serial No. 400,269.

of. The doors or drop bottom elements 13 are arranged in pairs along thecar being hinged to the top plate 14 of the center sill by hinges 15.Fig. 1 shows the end pair of doors. The others may be of likeconstruction.

Each door consists preferably of a single sheet of metal which hasformed therein, preferably by pressing, a plurality of corrugations orribs 16 which are preferably parallel and merge one into the other,giving the sinuous configuration shown in Fig. 3, and terminate Withinthe edges of the panel. Certain of the edges of the panel, preferablythe edges at the ends of the corrugations, are bent around andpreferably secured to the body of the panel, for example, by rivets 17,so as to provide hollow reinforcements 18. These reinforcements addconsiderably to the strength and rigidity of the door, reinforcing it inthe direction at right angles to the reinforcement provided by ribs 16.That is, the hollow reinforcements 18 take the stresses transmitted bythe ribs 16 which under load function as beams. The other two edges ofthe door may be correspondingly formed, but ordinarily it will besufficient to merely bend over the sheet at these places to providedownturned flanges 19.

In Figs. 4 and 5 the same principle of construction is applied to a doorintended for a hopper car. The door 20 is formed of a sheet of metalhaving pressed therein rigidifying ribs or corrugations extending fromthe hinged edge 21 of the door to the opposite edge 22. These edges ofthe door are provided with hollow reinforcements 23, 24, the othertwoedges being bent over to form flanges 25, 26. The reinforcing ribs orcorrugations are shown as extending from the hollow reinforcement 23 atone side of the door to the opposite reinforcement 24. The reinforcement23 is cut away as indicated at 27 for the hinge members 28.

In Figs. 6 and 7 the marginal reinforcement of the door is accomplishedin a somewhat different way. All four edges of the door 29 are bent downto provide flanges 30, these flanges having inturned flanges 31 to giveadditional stiffness to the structure. The body of the door is formedwith rigidifying ribs or corrugations 32.

I claim:

1. A door or drop bottom panel for a railway dump car comprising a.sheet metal element formed with rigidifying corrugations and having itsedges, at opposite ends of said corrugations, bent over upon themselvesto form marginal hollow reinforcements extending substantially thelength of said edges.

2. A door or drop bottom panel for a railway dump car comprising a sheetmetal element formed with substantially parallel rigidifyingcorrugations and having its edges, at opposite ends of saidcorrugations, bent over upon themselves to form marginal hollowreinforcements extending substantially the length of said edges.

3. A door or drop bottom panel for a railway dump car comprising a sheetmetal element formed with rigidifying corrugations and having oppositeedges thereof bent over upon and riveted to the body of said sheet metalelement to form marginal hollow reinforcements extending substantiallythe length of said edges.

4:. A door or drop bottom panel for a railway dump car comprising asheet metal element, one edge of which is bent over and secured to thebody of the door to form a hollow integral marginal reinforcementextending substantially the length of said edge.

5. A door or drop bottom panel for a railway car comprising a sheetmetal element opposite edges of which are bent over and secured to thebody of the door to form integral hollow marginal reinforcements extending substantially the length of said edges.

6. A door or drop bottom paned for a railway car comprising a sheetmetal element, opposite edges of which are bent over and secured to thebody of the door to form integral hollow marginal reinforcementsextending substantially the length of said edges, the door beingprovided with reinforcing ribs between said marginal reinforcements.

7. A door or drop bottom panel for a railway car comprising a sheetmetal element, opposite edges of which are bent over and secured to thebody of the door to form hollow marginal reinforcements extendingsubstantially the length of said edges, the

door being provided with reinforcing ribs between said marginalreinforcements which extend at substantially right angles thereto.

8. A door or drop bottom panel for a railway dump car consisting of asingle sheet of metal formed with a plurality of substantially parallelcorrugations which terminate within the edges of the sheet and merge oneinto the other giving the sheet a sinuous configuration, the edges ofthe sheet being bent down to rigidify the structure and certain of thembent around and secured to the body of the sheet to provide hollowmarginal reinforcements.

9. A door or drop bottom panel for a railway dump car consisting of asingle sheet of metal formed with a plurality of substantially parallelcorrugations which terminate within the edges of the sheet and merge oneinto the other giving the sheet a sinuous configuration, the edges ofthe sheet at the ends of the corrugations being bent around and securedto the under side of the sheet to form hollow marginal reinforcementsand the other edges being bent down to provide flanges.

10. A door or drop bottom panel for a railway dump car, consisting of asheet of metal formed with a plurality of substantially parallelcorrugations, terminating within the edges of the sheet, the said edgesbeing bent over and riveted to the sheet to form integral hollowreinforcements at opposite'ends of said corrugations, and means forhinging the door to the car comprising hinge elements which extendacross the door parallel to said corrugations, and are riveted to saidreinforced edges.

11. A door or drop bottom panel for a railway dump car comprising asheet metal element formed with rigidifying corrugations and having itsedges at opposite ends of said corrugations bent first away from andthen toward the sheet to provide reinforcements extending substantiallythe length of said edges.

12. A door or drop bottom panel for a railway dump car comprising asheet metal element one edge of which is bent first away from and thentoward the sheet to form an integral reinforcement extendingsubstantially the length of said edge.

VVAL"ER P. MURPHY.

